Estimating an Instantaneous Rate of Change by Zooming-in at a Point

1. Which of the following graphs, i, ii, iii or iv, of the function f is best to accurately estimate the instantaneous rate of change of f at the input -1?

i.

ii.

iii.

iv.

2. Use your answer from problem 1 to estimate the instantaneous rate of change of f at -1.

instantaneous rate of change of f at -1 = f '(-1) ≈